With the adoption of distinctive technique this milky quartz glass tube has its typical characteristics of good visual aspects and stable physical & chemical properties. It is used as material of infrared heating lamps for heaters, microwave oven, electrical baking oven, sterilization container and other consumer and industrial infrared application Further processing of trim cutting, closing, pinching, bending and etc. can be done according to the demand of the customers Dimensional Tolerance Range of OD WT Siding Out of Round Bow/1220mm 8.0±0.15 1.0±0.10 10% 1.5% 2.5mm 9.0±0.15 1.0±0.10 10% 1.5% 2.5mm 10.0±0.15 1.0±0.10 10% 1.5% 2.5mm 10.5±0.15 1.0±0.10 12% 1.5% 2.5mm 11.0±0.18 1.0±0.10 12% 1.5% 2.5mm 12.0±0.20 1.0±0.10 12% 1.5% 2.5mm 13.0±0.22 1.0±0.10 12% 1.5% 2.5mm 12.0±0.3 1.5±0.10 12% 1.5% 2.5mm Physical & Chemical Properties Opalescence SiO2 Heat Resistance Spectral transmission at 500nm<10% SiO2>99.5% Keep under 900℃ for 15 minutes, then put into 20℃ water, no crack after 3 times.